Mixing nozzle



Patented Dec.v3l, 193.5 l' v f l 2,025,974 V Nozz'nn` Willlam`A.`-Frltz,Columbus','0hlo Application December 24, 1931,*Sei-ia1`No. 583,029 ioiaim. (ci. iaidnl y This invention relates to improvements in mixtated and .worked to produce v a plastic mixtureof ing nozzles and has particular reference to nozzles uniform properties, whereby when sprayed fromof the type employed inthev sprayingof cementithe nozzle, such mteriolswill Properly adhere yt tious vmixtures or materials lwhereby the latter and unite with the wall surfaces to be protected 5 are advanced under pressure throughconned thereby; specifically overcoming-the ObjectiOn ,5 conduits or pipe lines and deposited on walls or above noted in Standard nozzle construction. surfaces which areadapted to be `protected or 1t` `is `another object of theinvention t0 .prostrengthened by the applicationlof such materials. Vide `en improvednczzle ,of the Character stated Atpresent, in applying cementitious materials wherein a mixing cnamberjOf zigzag formy is utilby the spraymethod to walls or other surfaces, izedfthe seid chamber or passoeadue to its tortu- 10 it S oustomoryto arrange a. manipulatory nozzle ous form, serving to eiect the desired of at one end `of a hose or conduit Vthrough which theingredents entering into the composition'of regulated proportions of sand and'cement are adythe cementitious mixturey discharged from vthe vanced under pressure, the nozzle, at itsV point of nozzle so that such materiels Will vpossess the connection with the conduit, being provided with requisite uniformity or plastioitywhen vflrsirap- 15 a water inlet or ring by which water under presplied too Wall smfocef A. l sure is introduced into the advancing sand and Withthese and `other objects in View,y which cement mixture and then forced through the -will appear as thetdesoribtionpro'eeeds, the innozzle under pressure and appliedin the form of Venticn consists in the novel features v,0f conm a. protective or strengthening 1ayer on desired struction, combination of elements and arrange- 20 wall surfaces after being expelled'from the nozzle. ments yof parte hereinafter fully described and.' 1n this operation, I have observedthat the water .pointed out in the appended .claim piped to the sand and cement mixture does not Inthe accompanying drawing: vuniformly and -intimately combine or'eommingie Fie. 1 is a perspective .View efe mixing` nozzle with the solid materials to produce a plastic forthe spraying of cementitious mateals, the '25 UNITED sin'rssI PATEtNr ortica jj:

cementitious mixture when discharged from the Said nozzle being constructed in accordance with nozzle. 1n other words, there is a decided tendthe vfeatures of the present invention: e ency, often repeated,1for the sand or cement to :Fig- 2 iS o horizontal sectional vView taken strike the wall surface in a relatively dry state, thro h the nozzle, disclosing more particularly with the result that where suiicient water is not the tortuois. 0r zigzag form ofitS mixing chamber 30 present, the sand and cement pockets in a. rela- 0r Passage; y tively dry state, producing an mefncie'nt condi- Fig. 3 isla vertical transverse sectional view tion which requires careful inspection, considertaken 0n vthe plane disclsedby the line 3-3 of 'able repair or patch-work to build up to the re- Fig, 2, and illustrating the construction of e Wei-1 quired depth a uniform cementitious covering lter ring .used in subjecting the liquid into the 35 and is generally unsatisfactory for these and other materials entering the mixing nozzle; reasons. Fig. 4 is a similar view taken through the 'mix- Iattribute this condition largely to the fact that ing chamber of thek nozzle o n the line 4 4 of in prior nozzle constructions, there does not take Fig. 2. 40 place, before the discharge of the materials there- Referring more particularly to the accompany- 40 from, a complete and intimate mixture or coming drawing, my improved mixlnfgnozzle is desmingling of the kseveral ingredients which are ignated initsuentirety bythe numeral In the merged at the nozzle to produce the desired unispecific form of Tthe nozzle herein Vselected for formity in the plastic condition of such materials illustration and description, it includes a twoprior tc their application to a wall surface. It is, part split casing structure designated ntf?. This therefore, an outstanding object of the present incasing consists of duplicate halves hating abutvention to provide an improved nozzle constructing edges which are adapted to 'securely tion especially adapted for the spraying of cemen-I j united by means of threaded bolts 5 jyvhich cotitious mixtures in an eective and efcient manoperate with lateral earsv 4 `dually formed ner on wall surfaces, and wherein the t'ionstrucwith-the registering'fcasinghaines, fwhereby such 50 tion of the nozzle is such that before the matelhalves are rigidly secured in connected relation-v` rlals are discharged from the outlet of the nozzle, ship.- The. casing structure thus formed provides there takes place a turbulent flow or passage of a mixing, passage or chamber 5 which, as shown Y the several materials entering into the cementlparticularly in Fig. 2, is of zigzag formation, pro- 55 tious mixture so that the latter isthoroughly agidueing a tortuous path for the material travel- 55 ling therethrough, and being composed of a plurality of relatively angular sections. The chamber or passage 5 has its interior walls provided with a lining .B composed of rubberv or other compressible material. The lining may be formed in sections or halves corresponding with the construction of the casing 2, the wavy curvilineal form of the casing rendering this construction necessary. 'Ihe lining serves to reduce `wear on the metallic walls of the casing and greatly prolongs the life of the tool. Handles I may be integrally formed in the casing halves and are adapted to be grasped by the operator to facilitate the manipulation of the nozzle.

The rear end of the casing structure is provided with a circular ange 8 with which engages` a corresponding flange 9 formed upon a collar I0, the flanges 8 and 9 being mounted orA otherwise connected as at I I. The small end of the collar III is externally' threaded and is received within the internallythreaded end of a water ring I2, the other end of said ring being threaded for the reception of a kcoupling sleeve I3, which is used to connect the'fiexible sand and cement conduit I4 with the water ring and thereby with thenozzle proper. 'I'he construction of the water ring has been best disclosed in Fig. 3 wherein it will be noted that the ring isformed to constitute a casting in which is embodied "an arcuate chamber I5, water being introduced into the chamber I5 by way of a Vhose I6. 'I'he ends of the chamber- I 5 are closed by means o1' threaded plugs I'I. In the water ring, the chamber I5 is separated from an annular chamber` I8v by means rof a partition I9 and openings 20 are provided in said partition to permit of water ow from the chamberr IS'into the chamber IB. 'I'he chamber I8 annularly surrounds they main opening or the ring and water iiows under lpressure from the chamber I8 into the main opening or passage of the ring through the radially disposed ports 2|. Y

Sand and cementy in mixed relationship and desired relative proportionsis advanced through the conduit I4 under pressure. l This pressure may vary and may be approximately of the order of from 40 to 50 pounds per; square inch, depending upon the length of the hose or conduit `and the proportions and quantity of the material ad;

vanced therethrough. Water, for example, under a pressure of about 25 pounds per square inch is advanced into the water ring and thence through the ports 2I into intimate contact wit the sand and cement passing through the ring following discharge from the conduit Il. The 5 water thus mixes'with the sand and cement but the mixture is not satisfactory to permit of direct application to a wall surface and therefore the present iinvention resides primarily in the provision of the zigzag mixing passage provided in the 10 Icasing structure 2, which is of such form that the cementitiousmixture, inv traversing the` casing structure, isagitated back and forth and a certain degre of turbulence applied thereto whereby i lthe water and the remaining ingredients of the v mixture are thoroughly commingled and the mixture, upon being discharged from the casing structure, isA substantially uniform in plasticity throughout its entire mass. The outer end of thecasing structure is provided with the usual nozzle 2.2, which is mounted or otherwise secured as at 23 to the forward end of the casing structure 2. In `operation,:the toolis manipulated in the usual manner so that the cementitious mixture issuing from the outer end of the nozzle may be 25 sprayedior otherwise directed upon the surface or surfaces to `be covered with the cementitious mixture to, a desired depth..` I have found that by mixing the ingredients of the vmixture in the mannerrspecified, said mixture when discharged froml the nozzle will-readily andiirmly vadhere to the surfaces Auponwhichity is directed, eliminatingthe so-called soft or sand spotsproduced by the customary-type of nozzle. Thispermits of greatly Aaccelerated speed of application' and, 35.

Yin addition," provides for lbetter and stronger prov'teotion of the objects or surfaces upon which the f I cementitious material is applied.

Whatisclaimed is:

n A mixing nozzle for a spraying cementitious 40 material comprising. a casing divided intotwo llongitudinally extending sections secured togetherto'form a'passage, the longitudinal center line of which forms a W, a resilient lining for l said passage,'a -conduit for introducing sand and 45' `cement under'pressure into the inletof said passage'and a. discharge nozzle communicating directly with the outlet of said passage. l

` WILLIAM A. FRI'IZ. 50 

